Electrical Characterization of Interdigitated Humidity Sensors Based on CNT Modified Calixarene Molecules

C. Özbeka, E. Culculara, S. Okurb, M. Yılmazc and M. Kurtd aDepartment of Physics, Faculty of Science, Izmir Institute of Technology, Gulbahce Koyu Kampusu, 35430, Urla, Izmir, Turkey bMaterial Science and Engineering, Faculty of Engineering and Architecture, Izmir Katip Celebi University, Cigli, İzmir, Turkey cDepartment of Chemistry, Selçuk University, Selçuklu/Konya, Turkey dDepartment of Physics, Ahi Evran University, 40100 Kırsehir, Turkey

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In this study, we report on the optimization and characterization of chloroform: soluble calix[4]arene derivative as a humidity sensor based on electrical properties. Due to the fact that calix[4]arene molecules are nonconductive, we modified the calix[4]arene molecules with carbon nanotubes with electrostatic bond in order to increase the conductance of calix[4]arene molecule (5,11,17,23-tetra-ter-butyl-25,27-dehydrazin-amid-carbo-nilmetoxy-26,28-dehydroxy-kalix[4]aren). Using photolithography technique, we fabricated interdigitated gold electrodes with 3 micrometers separation to investigate the electrical properties of carbon nanotubes modified calix[4]arene molecule where we used dropcast method to form a thin film of carbon nanotubes modified calix[4]arene molecule on the gold electrodes. Our reproducible experimental results indicated that the chloroform soluble carbon nanotubes modified calix[4]arene films have great potential for humidity sensing applications at room temperature operations.

DOI: 10.12693/APhysPolA.123.461 PACS numbers: 66.30.je, 65.40.gp, 65.40.gk, 65.40.gd, 64.70.fm, 64.10.+h, 51.10.+y